/*
 * @Author: gyp
 * @Date: 2020-06-22 13:57:29
 * @LastEditors: gyp
 * @LastEditTime: 2020-06-22 13:57:57
 * @Description: 
 * @FilePath: \fed-e-task-01-01\test.js
 */ 
document.write('task 1')
document.write('task 2')
document.write('task 3')
document.write('task 4')